Im am new here and look forward to communicating with other members through posts. I tried to post in the HVAC open discussion, but it seems I can only post here. I have both a propane furnace and a wood burning furnace in my home. A year or so ago I found a few different types of thermostats that you could hook both furnaces to. It would kick the propane furnace off when the wood furnace got up to temp and turn it off and start the propane furnance when the temp was to low in the wood furnace. I just got everything hooked up, but now I cannot find one of these thermostats. Anyone know a brand or model I could look up, or a place that sells them? I have searched all over and have found nothing. I would appreciate any information.